See https://cxc.harvard.edu/mta/SOT_reports/sot-shift.html Shift L9798. Start at 139:13:00 GMT PLAN ---- Finish: Obsid: 29879 SI: ACIS-S (48 ksec) Target: SDSS J155636.40 Then: 2026:139:23:50:48 Grating: HETG 2026:139:23:52:51 RADMON Disable 2026:140:12:30:28 RADMON Enable 2026:140:12:55:29 Obsid: 30086 SI: ACIS-S (21 ksec) Target: TV Cassiopeia NOTES/ISSUES/PROBLEMS --------------------- From the 9am status meeting: 3 Supports Completed in the last 24 hours (Total time: 6 hours) 3 SSR dumps. Loads good through: 2026:143:12:15:02. Radiation (Solar Activity): Solar activity is expected to be low with a chance for M-class flares on days one, two, and three (19 May, 20 May, 21 May). Radiation (Geophysical Activity): The geomagnetic field is expected to be at quiet to minor storm levels on day one (19 May), quiet levels on day two (20 May) and quiet to unsettled levels on day three (21 May). MP: MAY25 loads in work. ENG: No issues. GOT: No issues. Quick look data: ---------------- OBSID Target Instr Grat ----- ------ ----- ---- 30247 Center of COSMOS-Web ACIS-I NONE 30206 NGC5728 ACIS-S NONE 32352 NGC5728 ACIS-S NONE 32353 NGC5728 ACIS-S NONE 31883 ZwCl 0857.9+2107 ACIS-S NONE Next Comms: ----------- Support (GMT) BOT EOT Station Site Track time (local) --------------- ---- ---- --------- --------- ------------------------- 139/1715-1915 1800 1900 DSS-34 CANBERRA 1400-1500 EDT, Tue 19 May 140/0005-0205 0050 0150 DSS-54 MADRID 2050-2150 EDT, Tue 19 May 140/1100-1300 1145 1245 DSS-26 GOLDSTONE 0745-0845 EDT, Wed 20 May SNAPSHOT summary: ----------------- UTC 2026:139:10:53:02 (May19) f_ACE 1.08e+01 F_CRM 6.58e+07 Kp 2.7 R km 130798D OBT 2026:139:10:50:40 CTUVCDU 14451839 OBC s/w NRML FMT2_NORM CPEstat NORM OBT 895575040.47 ONLVCDU 14451832 OBC Errs 0 OBSID 29879 EPState SUN SIM TTpos 75624 HETG Angle 77.59 PCADMODE NPNT RA 239.155 Bus V 27.11 SIM FApos -467 LETG Angle 76.09 PCONTROL NPNT Dec 41.894 Bus I 24.17 AOFSTAR GUID Roll 176.491 ACA Object FFFSSSSS Dither ENAB HRC-I HV OFF ACA ImFunc TTTTTTTT Dith Yang -4.88 Yaw Rate -0.02 HRC-S HV OFF ACA CCD Temp -7.3 Dith Zang 11.19 Pitch Rate 0.07 SHLD HV 0.0 ACA Int Time 1.698 Roll Rate 0.25 EVT RT 3824 AOACSTAT OK FSS SunBeta SUN SHLD RT 0 FSS Alfa -0.14 Batt 1 SOC 100.00% Avg HRMA Temp 73.24 FSS Beta -28.64 Batt 2 SOC 100.00% A -15 V -0.62 Avg OBA Temp 78.23 SA Resolv 118.15 Batt 3 SOC 100.00% A +15 V 2.81 OBA Tavg Fault NFLT SA Sun Pres ILLM A +5 V 4.84 OBA Trng Fault NFLT +Y SA Amps 12.18 A +24 V 0.00 HRMA power 72.20 SCS 128 ACT -Y SA Amps 11.60 OBA power 0.00 SCS 129 ACT +Y SA Temp 109.89 SCS 130 ACT -Y SA Temp 109.28 ACIS Stat7-0 6 Roll Mom. 2.519 SCS 131 ACT Cold Rad -115. Pitch Mom. 1.324 SCS 132 ACT Ephin Temp 0.0000 Warm Rad -77.1 Yaw Mom. 1.265 SCS 133 ACT EIO Temp 0.0000 RadMon ENAB PMTANKP 150.132 SCS 107 INAC EPH temp 178.27 UpLCmdAcc 42892 IRU2G2 curr 127.20 M Unload MON Cmd Rej A 224 IRU2G1 curr 96.00 Roll Bias 2.0243 TSC Move STOP Prop. line 03 104.49 Pitch Bias -4.2058 FA Move STOP CTX B PWR 36.96 Prop. line 04 105.75 Yaw Bias -1.8396 OTG Move DISA CTX B Volts 3.54 UTC 2026:139:12:56:01 (May19) f_ACE 1.58e+01 F_CRM 6.63e+07 Kp 2.7 R km 125295D Currently scheduled FPSI, OTG : ACIS-S NONE Estimated Kp : 2.3 ACE EPAM P3 Proton Flux (p/cm^2-s-sr-MeV) : 1.25e+01 GOES-R P4 flux, in RADMON P4GM units : 4.10e-02 GOES-R P7 flux, in RADMON P41GM units : 5.68e-03 GOES-R E > 2.0 MeV flux (p/cm^2-s-sr) : 2.19e+03 Orbit Start Time : 2026:137:16:01:17 Geocentric Distance (km), Orbit Leg : 125376 D CRM Region : 3 (Magnetosphere) External Proton Flux (p/cm^2-s-sr-MeV) : 1.1239e+02 Attenuated Proton Flux (p/cm^2-s-sr-MeV) : 1.1239e+02 External Proton Orbital Fluence (p/cm^2-sr-MeV) : 1.8773e+08 Attenuated Proton Orbital Fluence (p/cm^2-sr-MeV) : 6.6344e+07